April

2013

 * April 26, 2013 - Miyako Yutsu is introduced

2012

 * April 02, 2012 - Yuwaku Koe is introduced
 * April 06, 2012 - Birthdate of Kagamine Renee and Kagamine Lenku
 * April 12, 2012 - Shine rokune is introduced
 * April 23, 2012 - Kadane Ken and Kadane Lin are introduced, their birthdate is the same
 * April 28, 2012 - Camila Nunez and Kamiro Nunez are introduced
 * April 30, 2012 - Tamasine Nakamura is introduced

2011

 * April 03, 2011 - Wakahisa Chiyo is introduced

2009

 * April 18, 2009 - Sora Harune is introduced, her birthdate is the same.
 * April 23, 2009 - Bitter Annie is introduced

2008

 * April 01, 2008 - Mokaito is introduced
 * April 05, 2008 - Anone Muri is introduced
 * April 11, 2008 - Sakine Meiko is introduced

Misc

 * April 09, 0000 - Birthdate of Kasane Keko